{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn08912_010.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Burlington, Vermont | 1950 | mapsnap generated fit (2026-10-24)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-10-24"},{"label":"run","value":"corpus-v2.2"},{"label":"pages","value":"94"},{"label":"placed","value":"58"},{"label":"unplaced","value":"36"},{"label":"fit sources","value":"georef-snap 34, georef 28"},{"label":"key map","value":"georeferenced"},{"label":"split sheets","value":"16 sheet(s) cut into 46 panels"},{"label":"unplaced pages","value":"p12 (tier 1, 44.48100,-73.21929 +/-256m); p19__2 (tier 1, 44.48139,-73.22227 +/-100m); p207__2 (tier 1, 44.49085,-73.19167 +/-354m); p208__2 (tier 1, 44.49647,-73.17594 +/-100m); p209__1 (tier 1, 44.47549,-73.20897 +/-199m); p209__2 (tier 1, 44.49471,-73.17480 +/-204m); p209__3 (tier 1, 44.49649,-73.17094 +/-118m); p31__2 (tier 1, 44.48567,-73.21282 +/-100m); p35__1 (tier 1, 44.48167,-73.21512 +/-221m); p36__1 (tier 1, 44.47117,-73.21765 +/-510m); p37 (tier 2, 44.46447,-73.21596 +/-389m); p41__2 (tier 2, 44.47324,-73.20432 +/-577m); p42__2 (tier 1, 44.48087,-73.20539 +/-100m); p44__2 (tier 1, 44.45570,-73.20843 +/-100m); p47__2 (tier 1, 44.50927,-73.24845 +/-252m); p47__3 (tier 2, 44.48824,-73.22534 +/-100m); p47__4 (tier 2, 44.48824,-73.22534 +/-100m); p47__5 (tier 2, 44.48824,-73.22534 +/-100m); p47__6 (tier 2, 44.48824,-73.22534 +/-100m); p48__2 (tier 1, 44.48340,-73.18998 +/-155m); p49__1 (tier 1, 44.44454,-73.20972 +/-214m); p49__3 (tier 1, 44.44420,-73.20991 +/-100m); p49__4 (tier 1, 44.44166,-73.20984 +/-100m); p50__1 (tier 1, 44.47371,-73.21102 +/-209m); p50__2 (tier 4, 44.48030,-73.20789 +/-4787m); p50__3 (tier 4, 44.48030,-73.20789 +/-4787m); p50__4 (tier 4, 44.48030,-73.20789 +/-4787m); p50__5 (tier 4, 44.48030,-73.20789 +/-4787m); p50__6 (tier 4, 44.48030,-73.20789 +/-4787m); p50__7 (tier 4, 44.48030,-73.20789 +/-4787m); p50__8 (tier 4, 44.48030,-73.20789 +/-4787m); p51__2 (tier 1, 44.50568,-73.24298 +/-200m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0001/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Burlington, Vermont | 1950 | sanborn08912_010 p1","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"5"},{"label":"confidence","value":"0.69"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:44:30Z","modified":"2026-10-24T15:44:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0001/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0001","type":"ImageService3","width":1624,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"185.7,1287.2 199.1,1287.2 178.3,680.9 189.0,681.0 198.6,69.5 1064.2,73.0 1368.4,73.8 1381.2,73.8 1378.7,686.5 1381.7,1280.8 1371.8,1280.8 1392.1,1874.8 1369.4,1874.7 1324.1,1875.2 780.1,1881.3 189.0,1883.0 185.7,1287.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0001/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[189.0,681.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.2157805,44.4792137]}},{"type":"Feature","properties":{"resourceCoords":[189.0,1883.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.2156379,44.4769811]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0010__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Burlington, Vermont | 1950 | sanborn08912_010 p10 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6552.0"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-10-24T15:44:30Z","modified":"2026-10-24T15:44:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0010__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0010","type":"ImageService3","width":1638,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"760.8,1238.2 761.1,1204.7 898.8,1207.3 1152.6,636.5 800.0,48.0 754.4,63.6 708.4,70.7 109.5,73.2 129.4,83.7 49.3,652.6 73.2,1899.0 762.6,1845.4 760.8,1238.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0010__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[753.0,1201.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.21325224446393,44.46904637924252]}},{"type":"Feature","properties":{"resourceCoords":[40.0,75.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.21520474311167,44.471024492098714]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0010__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Burlington, Vermont | 1950 | sanborn08912_010 p10 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.84"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"3162.0"},{"label":"split_canvas_y","value":"5300.0"},{"label":"split_canvas_w","value":"3390.0"},{"label":"split_canvas_h","value":"2496.0"}],"created":"2026-10-24T15:44:30Z","modified":"2026-10-24T15:44:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0010__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0010","type":"ImageService3","width":1638,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1272.7,1832.7 1547.8,1834.1 1581.8,1835.0 1576.5,1802.0 1575.9,1444.9 866.6,1499.0 869.7,1672.3 828.0,1828.4 856.0,1829.4 1272.7,1832.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0010__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[831.5,1829.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.21493795834307,44.46713559679178]}},{"type":"Feature","properties":{"resourceCoords":[1556.0,1829.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.21314826272483,44.46720023961185]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0011/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Burlington, Vermont | 1950 | sanborn08912_010 p11","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.92"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:44:30Z","modified":"2026-10-24T15:44:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0011/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0011","type":"ImageService3","width":1634,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1419.2,1476.9 1419.1,1694.3 1368.8,1694.7 1226.7,1692.0 1018.2,1686.1 271.8,1611.2 270.7,1596.5 249.9,1393.0 249.9,1239.9 273.8,897.1 242.0,895.2 256.7,548.9 231.1,546.6 215.8,409.5 277.3,381.6 235.8,291.1 766.4,290.8 1121.4,293.7 1437.2,292.4 1424.6,322.1 1424.1,354.3 1633.0,556.1 1633.0,1672.8 1617.3,1672.4 1629.2,978.7 1419.2,1476.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0011/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[911.0,734.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.22056992136012,44.48369062976676]}},{"type":"Feature","properties":{"resourceCoords":[1410.0,734.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.21931940842293,44.48374267911943]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0013/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Burlington, Vermont | 1950 | sanborn08912_010 p13","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:44:30Z","modified":"2026-10-24T15:44:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0013/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0013","type":"ImageService3","width":1634,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1242.8,1749.2 1213.2,1761.1 1158.9,1752.3 649.2,1745.0 210.8,1735.8 226.5,843.5 239.5,197.3 378.8,22.6 516.0,22.0 517.0,16.0 522.0,21.0 859.0,17.0 1037.0,21.0 1240.0,16.0 1464.7,28.2 1469.3,223.5 1459.5,223.4 1450.0,1097.3 1451.1,1750.5 1242.8,1749.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0013/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1456.0,912.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.21583869066428,44.48257103840461]}},{"type":"Feature","properties":{"resourceCoords":[837.0,1134.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.21518614224834,44.48148034031295]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0014/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Burlington, Vermont | 1950 | sanborn08912_010 p14","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:44:30Z","modified":"2026-10-24T15:44:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0014/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0014","type":"ImageService3","width":1638,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"213.2,1097.3 211.8,226.2 221.7,226.2 214.3,22.6 231.0,22.0 444.0,25.0 628.0,14.0 819.0,20.0 1246.0,18.9 1370.7,69.7 1372.1,218.3 1378.8,742.0 1377.4,894.9 1383.8,1746.1 809.5,1743.8 222.4,1748.2 213.2,1097.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0014/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[213.0,1092.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.21538356174953,44.482579192379696]}},{"type":"Feature","properties":{"resourceCoords":[801.0,899.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.21594209011774,44.4836256085617]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0015/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Burlington, Vermont | 1950 | sanborn08912_010 p15","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:44:30Z","modified":"2026-10-24T15:44:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0015/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0015","type":"ImageService3","width":1634,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"310.1,449.5 311.5,134.8 751.5,138.8 1263.1,139.9 1317.7,148.1 1313.3,1034.4 1307.6,1135.6 1307.6,1820.0 805.5,1827.6 310.2,1829.8 310.1,511.9 310.1,449.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0015/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[309.0,1062.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.21124130537605,44.480491053829276]}},{"type":"Feature","properties":{"resourceCoords":[1318.0,651.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.2123948753605,44.482267447844656]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0016/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Burlington, Vermont | 1950 | sanborn08912_010 p16","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:44:30Z","modified":"2026-10-24T15:44:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0016/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0016","type":"ImageService3","width":1638,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"146.3,189.7 348.8,187.1 921.3,179.1 1481.5,177.6 1482.7,1097.5 1474.2,1805.9 542.5,1817.6 119.1,1821.2 114.5,1158.3 119.5,1060.2 117.7,201.8 146.3,189.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0016/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[133.0,683.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.21241131328088,44.48228852444407]}},{"type":"Feature","properties":{"resourceCoords":[1466.0,1096.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.21147747541173,44.48479019803654]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0017/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Burlington, Vermont | 1950 | sanborn08912_010 p17","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"14"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:44:30Z","modified":"2026-10-24T15:44:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0017/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0017","type":"ImageService3","width":1634,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"617.8,250.3 1116.7,243.3 1551.0,243.0 1551.0,842.0 1546.5,1701.6 1546.5,1712.6 1209.7,1700.3 1086.1,1706.3 771.6,1702.1 509.4,1712.1 112.5,1711.0 113.2,1683.0 114.2,1088.8 125.7,252.1 617.8,250.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0017/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1551.0,842.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.2079896,44.4831843]}},{"type":"Feature","properties":{"resourceCoords":[1551.0,243.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.2095063,44.4831322]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0018/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Burlington, Vermont | 1950 | sanborn08912_010 p18","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"1.00"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:44:30Z","modified":"2026-10-24T15:44:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0018/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0018","type":"ImageService3","width":1638,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1267.0,227.9 1266.7,1050.2 1267.7,1708.7 813.3,1712.7 335.1,1711.7 322.4,851.1 310.3,251.4 1267.0,227.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0018/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[319.0,1350.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.20672671332362,44.48320352985145]}},{"type":"Feature","properties":{"resourceCoords":[319.0,241.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.20953334561818,44.48314731551767]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0019__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Burlington, Vermont | 1950 | sanborn08912_010 p19 [1]","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"8"},{"label":"confidence","value":"0.98"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6536.0"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-10-24T15:44:30Z","modified":"2026-10-24T15:44:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0019__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0019","type":"ImageService3","width":1634,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"409.1,800.3 427.1,1092.1 427.4,1144.2 313.5,1144.0 205.8,1805.6 318.1,1671.6 669.6,1776.7 1098.2,1745.7 1435.9,1860.0 1499.7,1819.3 1455.8,1536.0 1455.1,1536.0 1470.9,1147.0 1470.0,1147.0 1469.3,349.1 1472.9,27.5 1454.0,26.6 1414.0,26.0 1324.0,20.4 1303.1,55.0 868.6,262.6 637.4,217.1 547.7,466.0 411.9,540.3 395.3,595.1 409.1,800.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0019__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[183.0,1147.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.225388,44.488277]}},{"type":"Feature","properties":{"resourceCoords":[1470.0,1147.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.223777,44.4862497]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0002/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Burlington, Vermont | 1950 | sanborn08912_010 p2","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"14"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:44:30Z","modified":"2026-10-24T15:44:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0002/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0002","type":"ImageService3","width":1629,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1338.0,1866.0 733.0,1906.0 564.0,1908.7 192.4,1908.9 161.8,1908.9 137.7,1300.5 147.8,1300.5 141.3,691.6 140.4,64.0 189.1,63.6 1494.0,54.3 1508.2,824.9 1520.7,1250.7 1527.3,1855.2 1527.5,1868.0 1338.0,1866.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0002/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1207.0,858.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.2099573,44.4790798]}},{"type":"Feature","properties":{"resourceCoords":[733.0,1906.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.2110555,44.4771448]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0020/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Burlington, Vermont | 1950 | sanborn08912_010 p20","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"17"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:44:30Z","modified":"2026-10-24T15:44:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0020/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0020","type":"ImageService3","width":1638,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1419.1,1445.3 1372.0,1703.3 1170.8,1756.2 228.3,1780.2 171.1,1817.8 122.2,1531.7 132.1,1137.8 120.7,330.2 120.2,23.2 131.2,22.9 161.3,21.9 574.1,206.6 1538.9,646.0 1310.9,1125.7 1410.5,1127.1 1409.2,1194.7 1539.8,1239.8 1419.1,1445.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0020/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[789.0,1135.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.2229776,44.4852222]}},{"type":"Feature","properties":{"resourceCoords":[544.0,193.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.2212034,44.486418]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0201/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Burlington, Vermont | 1950 | sanborn08912_010 p201","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.90"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:44:30Z","modified":"2026-10-24T15:44:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0201/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0201","type":"ImageService3","width":1622,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"46.0,152.4 44.5,29.1 95.7,35.9 655.9,40.3 651.3,290.0 1589.7,444.1 1586.9,468.6 1569.2,886.0 1522.0,884.2 1563.6,968.2 1544.5,1516.0 1551.6,1516.4 1447.9,1883.5 1438.7,1896.8 1142.0,1908.7 1129.0,1938.8 1126.0,1939.0 1125.0,1948.0 1048.4,1948.0 1013.6,1944.2 1013.0,1939.0 932.4,1935.5 585.3,1897.9 595.9,1801.8 618.1,1611.6 618.6,1506.5 350.1,1497.2 289.6,1469.9 298.3,1429.6 309.5,1194.2 331.3,820.1 39.4,802.4 46.0,152.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0201/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[321.0,1189.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.18725041710653,44.490749405103855]}},{"type":"Feature","properties":{"resourceCoords":[1554.0,869.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.18421061360749,44.49139742143887]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0202/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Burlington, Vermont | 1950 | sanborn08912_010 p202","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:44:30Z","modified":"2026-10-24T15:44:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0202/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0202","type":"ImageService3","width":1647,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"260.5,1834.8 151.8,902.4 390.0,838.9 242.1,306.0 234.6,255.6 684.0,139.9 816.4,105.5 919.2,84.3 928.7,82.4 984.5,77.5 1523.2,225.0 1514.0,333.4 1505.2,435.2 1480.9,708.6 1476.3,1029.8 1467.5,1377.6 1458.0,1683.1 979.6,1734.9 295.6,1828.8 260.5,1834.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0202/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[708.0,136.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.18805014380959,44.49366975275275]}},{"type":"Feature","properties":{"resourceCoords":[395.0,830.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.18653991016238,44.492823124329966]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0203/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Burlington, Vermont | 1950 | sanborn08912_010 p203","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"13"},{"label":"confidence","value":"0.91"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:44:30Z","modified":"2026-10-24T15:44:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0203/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0203","type":"ImageService3","width":1622,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1376.4,413.6 1459.9,545.8 1466.8,617.4 1460.2,1083.5 1450.5,1776.3 983.0,1766.1 860.3,1768.3 213.8,1765.0 231.3,1452.2 210.8,1393.8 272.4,1338.1 286.1,1311.0 420.2,1224.4 573.4,305.1 1376.4,413.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0203/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[680.0,1767.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.188018,44.49225]}},{"type":"Feature","properties":{"resourceCoords":[614.0,1098.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.1896872,44.4920947]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0204/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Burlington, Vermont | 1950 | sanborn08912_010 p204","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.91"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:44:30Z","modified":"2026-10-24T15:44:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0204/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0204","type":"ImageService3","width":1642,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"791.9,1921.3 792.0,1909.2 334.8,1915.7 112.7,1853.2 87.7,1819.8 69.4,1409.8 61.1,637.6 89.2,85.7 397.5,28.9 1154.5,35.0 1201.6,61.5 1486.8,66.6 1485.5,30.1 1536.7,31.2 1542.8,21.0 1555.1,711.5 1521.7,710.6 1515.8,982.0 1503.5,1422.6 1277.8,1422.4 1243.1,1426.3 1179.7,1467.6 1130.0,1877.0 791.9,1921.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0204/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[873.0,38.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.19317610641572,44.498668539126285]}},{"type":"Feature","properties":{"resourceCoords":[955.0,1513.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.19261697806209,44.493235433119764]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0205/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Burlington, Vermont | 1950 | sanborn08912_010 p205","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"10"},{"label":"confidence","value":"0.83"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:44:30Z","modified":"2026-10-24T15:44:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0205/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0205","type":"ImageService3","width":1622,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"71.7,308.1 96.6,123.5 295.2,122.4 303.6,162.7 421.2,159.8 447.8,196.0 605.9,192.2 640.9,121.4 717.4,90.2 1047.3,41.7 1396.6,37.0 1516.2,115.0 1593.1,407.5 1621.0,404.7 1621.0,420.7 1500.8,779.5 1490.0,797.0 1452.7,793.8 1353.1,1085.1 1174.8,1617.5 1009.1,1576.3 855.8,1539.9 727.4,1499.2 628.6,1468.3 500.7,1710.7 497.1,1737.9 496.2,1794.2 498.6,1861.3 161.5,1875.3 155.3,1432.2 149.8,1159.3 183.4,1158.8 142.0,465.6 136.2,476.1 84.8,477.2 71.7,308.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0205/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[752.0,935.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.186638,44.497]}},{"type":"Feature","properties":{"resourceCoords":[575.0,1451.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.1876118,44.4951237]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0206/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Burlington, Vermont | 1950 | sanborn08912_010 p206","metadata":[{"label":"streets","value":"18"},{"label":"intersections","value":"27"},{"label":"confidence","value":"0.77"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:44:30Z","modified":"2026-10-24T15:44:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0206/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0206","type":"ImageService3","width":1641,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1549.7,1000.6 1472.5,1318.7 1550.0,1441.3 1579.1,1490.3 1372.5,1703.2 1361.2,1683.8 882.5,1753.0 856.6,1752.8 669.8,1756.6 510.2,1756.8 433.9,1762.3 311.0,1782.3 162.3,1816.9 74.3,1252.3 28.0,942.5 63.2,927.9 64.8,907.0 2.8,508.9 96.7,447.6 94.9,358.9 127.1,324.2 105.6,114.0 179.8,171.4 302.7,99.7 734.8,54.7 764.4,85.4 820.5,63.2 930.5,92.5 1372.7,50.5 1533.8,102.9 1589.8,251.6 1571.2,902.2 1622.7,996.0 1622.8,1002.3 1623.2,1029.1 1594.5,1046.3 1578.3,1048.9 1567.8,1037.7 1549.7,1000.8 1549.7,1000.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0206/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[664.0,841.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.1799551,44.4966736]}},{"type":"Feature","properties":{"resourceCoords":[1424.0,1242.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.1775637,44.4940889]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0207__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Burlington, Vermont | 1950 | sanborn08912_010 p207 [1]","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"16"},{"label":"confidence","value":"0.46"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"3019.6"},{"label":"split_canvas_w","value":"6488.0"},{"label":"split_canvas_h","value":"4776.4"}],"created":"2026-10-24T15:44:30Z","modified":"2026-10-24T15:44:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0207__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0207","type":"ImageService3","width":1622,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1444.6,1507.2 1458.0,1415.2 1459.7,1364.2 1329.5,1356.0 1300.5,1342.0 1305.3,1322.5 1314.0,1208.5 1329.7,1027.4 1188.3,1014.9 1036.0,1001.2 1007.1,1010.2 981.0,979.3 968.0,972.1 927.9,905.4 482.0,815.7 478.6,835.5 136.2,864.0 99.2,1488.0 138.8,1560.7 239.0,1611.5 285.6,1802.8 602.7,1867.6 797.3,1828.5 1145.3,1873.3 1142.5,1916.3 1411.3,1752.0 1424.2,1653.4 1444.6,1507.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0207__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1314.0,1208.5],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.1872785,44.4907394]}},{"type":"Feature","properties":{"resourceCoords":[1012.0,1040.7],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.1888803,44.4912813]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0208__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Burlington, Vermont | 1950 | sanborn08912_010 p208 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.84"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6588.0"},{"label":"split_canvas_h","value":"5508.0"}],"created":"2026-10-24T15:44:30Z","modified":"2026-10-24T15:44:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0208__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0208","type":"ImageService3","width":1647,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"188.9,626.0 223.0,825.3 200.5,829.3 228.8,864.8 275.5,1125.9 278.9,1125.3 268.2,1292.0 287.7,1260.3 362.6,1262.0 553.6,1201.7 570.0,1169.2 807.4,1119.7 834.6,1062.6 884.0,1046.4 886.5,829.5 1149.5,797.9 1315.0,384.2 1460.5,384.5 1498.3,303.2 1524.5,298.1 1424.2,188.8 1431.1,185.5 1425.6,159.9 1423.8,151.2 1164.6,284.2 1160.2,262.6 693.5,176.3 669.4,167.9 494.4,112.5 346.0,62.6 273.3,43.6 152.8,23.5 162.4,259.2 185.9,596.8 188.9,626.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0208__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[159.0,408.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.1841207368944,44.492917895847896]}},{"type":"Feature","properties":{"resourceCoords":[1159.0,318.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.17897185669406,44.49260240422335]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0208__3/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Burlington, Vermont | 1950 | sanborn08912_010 p208 [3]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.76"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"4157.6"},{"label":"split_canvas_w","value":"6588.0"},{"label":"split_canvas_h","value":"3638.4"}],"created":"2026-10-24T15:44:30Z","modified":"2026-10-24T15:44:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0208__3/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0208","type":"ImageService3","width":1647,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"373.6,1883.4 599.3,1816.5 755.5,1826.3 976.8,1917.5 1558.3,1884.5 1577.3,1706.5 1519.2,1404.5 1440.4,1315.4 1374.8,1122.9 1341.3,1113.1 1003.4,1139.1 989.8,1104.5 628.6,1225.2 634.1,1258.2 499.0,1296.2 487.4,1268.8 411.8,1286.2 410.3,1281.1 403.4,1313.1 371.9,1323.2 355.8,1322.2 348.2,1309.0 339.1,1269.6 339.0,1269.7 194.0,1557.8 241.2,1693.0 260.9,1754.9 269.0,1779.9 262.3,1784.0 373.6,1883.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0208__3/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[168.0,1476.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.17755026264742,44.49407518271616]}},{"type":"Feature","properties":{"resourceCoords":[590.0,1254.3],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.17516283445006,44.49443844514735]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0021/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Burlington, Vermont | 1950 | sanborn08912_010 p21","metadata":[{"label":"streets","value":"11"},{"label":"intersections","value":"15"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:44:30Z","modified":"2026-10-24T15:44:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0021/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0021","type":"ImageService3","width":1634,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"162.7,795.7 151.8,348.1 133.1,311.9 149.7,303.9 90.0,166.9 113.8,168.9 838.3,231.3 910.5,145.7 1120.5,135.3 1158.4,257.2 1299.6,272.8 1480.6,231.1 1477.8,879.2 1472.4,1527.6 1471.9,1846.2 1323.0,1846.0 1283.9,1939.0 1167.0,1939.0 1166.0,1948.0 1044.0,1948.0 1043.0,1939.0 862.6,1935.8 833.3,1907.6 833.8,1875.8 846.2,1846.3 533.2,1847.8 181.2,1845.2 162.7,795.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0021/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1476.0,1142.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.217826,44.4858708]}},{"type":"Feature","properties":{"resourceCoords":[162.0,763.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.2212034,44.486418]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0022/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Burlington, Vermont | 1950 | sanborn08912_010 p22","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:44:30Z","modified":"2026-10-24T15:44:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0022/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0022","type":"ImageService3","width":1640,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"580.1,1867.1 53.5,1875.3 49.7,1555.5 46.2,904.2 40.1,253.5 68.7,134.4 161.5,70.9 882.2,65.0 880.4,57.6 964.5,64.1 1042.2,46.1 1458.9,124.8 1532.3,222.2 1567.8,268.4 1573.0,1231.1 1589.9,1859.0 733.9,1868.0 580.1,1867.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0022/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[61.0,1165.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.2177936629213,44.485877586195556]}},{"type":"Feature","properties":{"resourceCoords":[1563.0,1237.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.21400154871304,44.48586654597223]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0023/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Burlington, Vermont | 1950 | sanborn08912_010 p23","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:44:30Z","modified":"2026-10-24T15:44:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0023/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0023","type":"ImageService3","width":1634,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"286.5,1767.4 281.9,1140.2 295.4,179.2 260.9,132.4 930.9,127.6 1430.4,129.9 1002.6,739.9 1627.7,1333.4 1249.5,1717.1 1233.3,1788.1 286.5,1767.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0023/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[410.0,354.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.21377963133783,44.48730649460464]}},{"type":"Feature","properties":{"resourceCoords":[275.0,1777.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.21389266037156,44.48473207699463]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0024/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Burlington, Vermont | 1950 | sanborn08912_010 p24","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"4"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:44:30Z","modified":"2026-10-24T15:44:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0024/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0024","type":"ImageService3","width":1640,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"268.9,1775.8 283.9,1705.2 653.1,1320.0 25.8,740.9 441.0,131.0 952.9,124.7 1566.8,109.4 1626.2,108.8 1626.6,141.6 1627.0,164.9 1040.2,904.5 954.5,994.5 988.9,1047.0 991.0,1791.0 268.9,1775.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0024/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[991.0,1791.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.2096338,44.4848583]}},{"type":"Feature","properties":{"resourceCoords":[441.0,131.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.2112433,44.4878257]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0025/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Burlington, Vermont | 1950 | sanborn08912_010 p25","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.95"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:44:30Z","modified":"2026-10-24T15:44:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0025/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0025","type":"ImageService3","width":1629,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"765.2,1928.5 673.2,1846.8 245.8,1852.3 172.7,1885.5 88.3,1895.9 34.4,1781.8 46.8,1519.8 141.7,1344.2 111.0,1050.7 48.1,991.7 148.7,608.8 152.0,141.7 1287.7,116.6 1289.3,92.7 1321.8,85.5 1386.6,72.6 1599.0,448.7 1578.5,579.7 1542.2,1077.8 1521.7,1074.8 1424.4,1777.0 765.2,1928.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0025/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1202.0,517.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.21256416033647,44.49005635891511]}},{"type":"Feature","properties":{"resourceCoords":[754.0,1943.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.21422425276035,44.48766551581733]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0026/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Burlington, Vermont | 1950 | sanborn08912_010 p26","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"9"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:44:30Z","modified":"2026-10-24T15:44:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0026/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0026","type":"ImageService3","width":1640,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"177.0,1200.0 196.7,1205.2 286.2,720.6 320.5,594.4 152.9,202.7 88.0,208.3 55.3,211.8 80.9,69.6 222.4,63.1 1123.7,193.6 1153.5,28.1 1370.7,42.6 1335.1,322.6 1333.7,333.6 1264.7,877.4 1268.3,876.9 1554.0,842.5 1625.0,1697.2 1012.0,1771.0 500.2,1826.1 5.6,1877.9 177.0,1200.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0026/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[177.0,1200.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.21199,44.4889842]}},{"type":"Feature","properties":{"resourceCoords":[1017.0,910.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.2098279,44.4894391]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0027/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Burlington, Vermont | 1950 | sanborn08912_010 p27","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.93"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:44:30Z","modified":"2026-10-24T15:44:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0027/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0027","type":"ImageService3","width":1629,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"579.9,1846.7 474.6,1849.1 475.4,994.1 188.8,1004.4 185.1,1004.6 299.1,470.2 301.4,459.4 360.1,184.2 537.4,211.2 1096.8,165.7 1323.8,62.9 1367.7,57.7 1486.8,924.2 1497.8,955.9 1526.0,955.8 1480.8,1000.4 1415.5,1438.3 1402.5,1509.0 1402.5,1525.2 1401.9,1781.9 1400.9,1826.5 1357.4,1827.5 1356.7,1827.5 579.9,1846.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0027/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[466.0,1836.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.20840128170343,44.48798898766641]}},{"type":"Feature","properties":{"resourceCoords":[-48.0,990.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.20979061587616,44.48948786453261]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0028/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Burlington, Vermont | 1950 | sanborn08912_010 p28","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"13"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:44:30Z","modified":"2026-10-24T15:44:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0028/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0028","type":"ImageService3","width":1640,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"885.5,1829.4 69.4,1825.9 54.4,1082.2 19.1,1030.3 103.2,938.9 677.1,189.4 675.3,133.3 689.1,132.9 721.0,132.0 1495.8,108.0 1539.8,106.6 1538.1,703.4 1539.3,1141.2 1539.0,1831.0 885.5,1829.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0028/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[616.0,135.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.2083782,44.4879658]}},{"type":"Feature","properties":{"resourceCoords":[1539.0,1831.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.2058864,44.4849346]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0029/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Burlington, Vermont | 1950 | sanborn08912_010 p29","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:44:30Z","modified":"2026-10-24T15:44:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0029/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0029","type":"ImageService3","width":1629,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"92.9,21.1 488.0,22.0 749.0,12.0 1062.0,16.0 1185.0,10.0 1520.3,22.1 1520.2,51.0 1516.0,598.0 1508.8,1767.7 1509.8,1813.1 552.4,1897.0 184.8,1930.6 57.9,1929.2 57.3,1929.2 65.0,1679.5 78.3,902.7 83.0,718.7 92.8,29.8 92.9,21.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0029/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1512.0,546.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.20445092643891,44.48328222560787]}},{"type":"Feature","properties":{"resourceCoords":[102.0,1548.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.20173090782536,44.480809993211224]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0003/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Burlington, Vermont | 1950 | sanborn08912_010 p3","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"12"},{"label":"confidence","value":"0.93"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:44:30Z","modified":"2026-10-24T15:44:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0003/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0003","type":"ImageService3","width":1624,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"849.3,76.0 1404.0,75.9 1440.9,75.9 1407.5,707.8 1445.0,708.0 1446.7,765.4 1440.8,1376.3 1429.0,1884.2 1425.5,1925.3 1390.6,1925.6 1383.2,1925.8 1232.0,1924.0 1109.8,1934.6 1102.1,1934.8 1021.0,1930.0 653.0,1933.0 549.0,1937.0 541.1,1936.6 541.0,1936.0 426.0,1931.0 229.6,1930.5 227.8,1891.3 236.8,1332.7 239.8,762.9 243.0,636.1 246.6,71.0 849.3,76.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0003/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[851.0,708.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.2140035,44.4758836]}},{"type":"Feature","properties":{"resourceCoords":[1445.0,708.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.2124878,44.4759449]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0030/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Burlington, Vermont | 1950 | sanborn08912_010 p30","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:44:30Z","modified":"2026-10-24T15:44:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0030/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0030","type":"ImageService3","width":1633,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"348.9,92.2 828.9,95.2 1285.0,93.0 1285.0,373.6 1282.0,925.3 1287.0,1819.2 366.6,1911.6 364.9,1865.8 353.8,684.8 349.4,132.4 348.9,92.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0030/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[354.0,637.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.2044396,44.4832916]}},{"type":"Feature","properties":{"resourceCoords":[1285.0,93.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.2058864,44.4849346]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0031__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Burlington, Vermont | 1950 | sanborn08912_010 p31 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.95"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6516.0"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-10-24T15:44:30Z","modified":"2026-10-24T15:44:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0031__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0031","type":"ImageService3","width":1629,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"191.1,1817.8 330.4,1820.1 604.4,1826.1 1048.2,1831.0 1216.8,1835.5 1628.0,1737.3 1628.0,1698.3 1561.6,1700.9 1594.5,1255.2 1576.5,1012.1 1606.7,927.8 1602.9,700.3 1562.1,620.0 1599.3,621.8 1300.4,484.3 1247.6,496.6 1215.0,476.4 1245.7,459.2 1048.2,382.6 1009.8,328.5 965.6,87.8 487.4,34.7 198.5,65.6 253.7,500.3 259.0,516.2 273.1,516.4 250.3,538.4 215.2,757.5 208.4,792.8 206.7,929.5 205.9,951.8 200.1,1251.5 197.0,1471.4 191.1,1817.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0031__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[338.0,1819.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.20514085443799,44.48495603019416]}},{"type":"Feature","properties":{"resourceCoords":[1444.0,1819.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.19953009376717,44.48515099941335]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0032/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Burlington, Vermont | 1950 | sanborn08912_010 p32","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.79"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:44:30Z","modified":"2026-10-24T15:44:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0032/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0032","type":"ImageService3","width":1633,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1495.0,53.9 1482.3,223.3 1561.2,641.9 1600.4,643.8 1589.8,1702.5 1568.1,1809.7 1489.9,1877.5 1220.2,1900.3 621.1,1885.6 522.0,1680.0 473.1,1577.2 430.4,1487.7 346.6,1312.9 204.0,907.1 208.6,796.2 208.7,794.9 209.3,779.6 220.1,530.1 224.9,389.0 231.5,318.0 238.1,288.8 277.8,168.9 296.1,99.0 296.9,92.9 360.9,96.8 547.2,88.9 1032.5,70.3 1495.0,53.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0032/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[291.0,1179.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.1953037790384,44.48111888129517]}},{"type":"Feature","properties":{"resourceCoords":[1250.0,81.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.20127949234431,44.484170378395405]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0033/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Burlington, Vermont | 1950 | sanborn08912_010 p33","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.95"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:44:30Z","modified":"2026-10-24T15:44:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0033/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0033","type":"ImageService3","width":1626,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"217.3,333.1 217.2,311.9 557.9,316.4 578.0,316.9 854.4,317.6 1201.8,322.9 1463.0,325.6 1462.7,344.2 1459.2,693.1 1457.3,786.3 1452.2,1179.8 1448.8,1312.5 1434.1,1383.4 1400.8,1505.5 1351.0,1504.1 1125.0,1521.4 1038.3,1531.2 909.7,1541.0 266.0,1592.4 219.7,1585.9 224.3,1529.5 221.2,1244.1 218.7,925.9 217.8,805.8 216.9,430.6 217.3,333.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0033/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1451.0,1341.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.20058179264467,44.48077478770344]}},{"type":"Feature","properties":{"resourceCoords":[224.0,317.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.20545869136932,44.476217844764086]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0034/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Burlington, Vermont | 1950 | sanborn08912_010 p34","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.55"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:44:30Z","modified":"2026-10-24T15:44:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0034/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0034","type":"ImageService3","width":1633,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"23.8,59.8 25.5,44.2 72.0,53.4 727.3,38.1 858.1,35.5 946.5,30.5 1176.6,25.9 1227.0,30.1 1220.1,59.9 1213.2,132.1 1208.0,275.6 1196.2,529.5 1195.5,546.4 1190.4,659.2 1334.3,1072.5 1419.2,1250.6 1511.8,1446.6 1612.0,1656.0 1586.5,1655.3 1546.6,1862.3 1318.0,1847.1 1007.8,1919.7 724.9,1872.2 462.5,1926.5 244.5,1881.7 123.7,1823.7 37.1,1692.2 66.4,1591.6 41.7,1339.8 82.3,1048.6 37.5,921.4 47.0,826.5 28.8,827.0 23.8,59.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0034/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1265.0,951.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.19522391090082,44.48107781896957]}},{"type":"Feature","properties":{"resourceCoords":[482.0,1579.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.19174246242345,44.47854455583208]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0035__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Burlington, Vermont | 1950 | sanborn08912_010 p35 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.69"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"858.4"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"5645.6"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-10-24T15:44:30Z","modified":"2026-10-24T15:44:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0035__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0035","type":"ImageService3","width":1626,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"902.9,1790.7 903.1,1813.2 1057.8,1822.9 1058.2,1827.6 1082.9,1846.9 1141.5,1846.2 1125.0,1827.2 1238.4,1834.3 1265.1,1822.8 1293.6,1837.8 1361.3,1842.1 1547.5,1841.9 1544.3,1605.5 1540.2,1398.4 1538.8,1215.9 1534.4,899.2 1582.3,899.5 1595.8,886.6 1625.0,886.4 1625.0,49.0 1525.0,299.1 1526.9,407.4 1501.9,408.0 1431.1,408.0 1328.2,407.0 1327.2,407.0 955.0,376.4 954.3,369.1 942.1,268.0 940.7,191.7 949.4,20.8 948.5,20.8 933.6,20.1 932.1,83.8 738.1,53.5 602.0,78.1 427.4,127.5 381.7,238.3 347.8,240.7 416.1,408.6 462.8,650.8 567.9,839.0 569.0,902.9 675.3,1061.1 738.0,1277.7 734.1,1375.2 802.7,1441.7 867.0,1429.3 958.2,1496.8 938.7,1796.4 902.9,1790.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0035__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1539.0,614.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.21905356756305,44.481286174547854]}},{"type":"Feature","properties":{"resourceCoords":[1539.0,407.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.21909525755515,44.482029807849706]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0036__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Burlington, Vermont | 1950 | sanborn08912_010 p36 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.30"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"3323.2"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"3208.8"},{"label":"split_canvas_h","value":"3240.0"}],"created":"2026-10-24T15:44:30Z","modified":"2026-10-24T15:44:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0036__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0036","type":"ImageService3","width":1633,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1592.3,809.0 1599.9,809.0 1594.5,537.5 1592.4,370.8 1586.8,79.6 1398.7,80.8 1330.3,76.9 1301.4,61.8 1274.6,73.6 1160.0,67.0 1176.7,86.1 1117.6,87.2 1092.5,67.8 1092.0,63.0 935.5,54.0 935.2,31.3 843.5,17.2 877.2,246.1 846.8,685.0 1085.5,795.8 1216.2,743.4 1423.6,773.4 1439.5,751.1 1514.5,776.5 1587.0,760.1 1592.3,809.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0036__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1565.1,718.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.21876136743764,44.474603528975955]}},{"type":"Feature","properties":{"resourceCoords":[1565.1,92.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.21886968910783,44.47682957029738]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0038/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Burlington, Vermont | 1950 | sanborn08912_010 p38","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.81"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:44:30Z","modified":"2026-10-24T15:44:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0038/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0038","type":"ImageService3","width":1633,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1526.7,102.5 1549.7,103.1 1550.5,289.6 1555.7,314.0 1545.7,685.6 1574.5,981.4 1544.3,1153.8 1590.3,1314.5 1599.0,1635.8 1632.0,1642.6 1632.0,1657.0 1564.2,1746.6 1204.3,1702.3 991.7,1677.4 938.4,1673.5 496.2,1928.5 468.8,1928.3 431.2,1928.0 435.4,1899.0 70.8,1856.8 38.6,1553.2 78.0,1252.8 30.2,873.1 42.1,337.4 113.2,91.2 1496.0,58.1 1526.7,102.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0038/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[513.0,387.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.21969895327933,44.460120264645454]}},{"type":"Feature","properties":{"resourceCoords":[1551.0,100.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.21456615136992,44.461305799072996]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0039/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Burlington, Vermont | 1950 | sanborn08912_010 p39","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.94"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:44:30Z","modified":"2026-10-24T15:44:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0039/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0039","type":"ImageService3","width":1622,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"861.8,1841.1 599.7,1841.5 404.0,1839.7 401.4,1824.0 398.5,1358.0 398.6,1341.6 465.9,1342.7 589.0,1063.4 415.8,776.4 393.9,736.6 368.1,684.4 350.0,626.3 341.8,553.5 340.0,481.2 338.5,100.7 362.2,100.4 606.2,90.0 623.4,89.6 623.8,84.0 675.1,83.8 731.0,88.2 916.3,88.1 1304.8,89.3 1301.3,512.4 1298.5,960.4 1298.8,994.2 1328.0,1273.2 1387.3,1843.2 861.8,1841.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0039/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[861.0,1843.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.21070563901402,44.46725789309164]}},{"type":"Feature","properties":{"resourceCoords":[1311.0,711.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.20863560267364,44.471537169589574]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0004/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Burlington, Vermont | 1950 | sanborn08912_010 p4","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"15"},{"label":"confidence","value":"0.94"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:44:30Z","modified":"2026-10-24T15:44:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0004/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0004","type":"ImageService3","width":1629,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"99.5,69.6 153.6,69.3 527.1,67.8 696.9,64.4 1304.6,21.9 1495.2,23.2 1495.7,51.4 1509.8,691.0 1511.0,1358.0 1514.5,1885.2 1514.6,1922.7 715.2,1927.9 334.0,1932.0 219.0,1924.0 113.4,1925.5 115.3,1895.5 116.9,1382.5 110.2,765.6 107.3,707.8 69.4,708.3 90.2,69.8 99.5,69.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0004/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[484.0,68.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.2115936,44.4771244]}},{"type":"Feature","properties":{"resourceCoords":[1511.0,1358.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.2088773,44.4748631]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0040/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Burlington, Vermont | 1950 | sanborn08912_010 p40","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:44:30Z","modified":"2026-10-24T15:44:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0040/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0040","type":"ImageService3","width":1633,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"112.2,1740.2 89.3,1740.2 57.8,1697.2 81.4,1696.0 91.0,1284.7 47.0,951.1 71.7,798.1 39.4,434.9 42.7,199.3 60.9,119.7 429.7,109.5 631.4,104.8 901.2,95.8 1442.6,80.7 1499.2,474.3 1506.8,542.1 1506.0,592.1 1499.8,658.3 1488.0,685.9 1466.8,698.2 1477.3,734.8 1485.1,802.8 1477.5,875.1 1461.1,1001.8 1455.9,1062.2 1477.2,1112.7 1506.8,1133.2 1512.6,1150.2 1506.2,1179.8 1491.4,1192.5 1473.3,1235.8 1496.2,1257.7 1527.5,1268.5 1467.4,1273.2 1453.0,1352.3 1442.3,1369.2 1401.1,1841.9 1263.8,1899.5 1264.8,1884.8 662.6,1868.8 487.4,1825.2 124.0,1857.4 124.2,1925.0 118.4,1925.0 112.2,1740.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0040/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1131.0,930.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.20948157383769,44.46426836985585]}},{"type":"Feature","properties":{"resourceCoords":[675.0,1274.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.211761329392,44.46300451413555]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0041__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Burlington, Vermont | 1950 | sanborn08912_010 p41 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.95"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6488.0"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-10-24T15:44:30Z","modified":"2026-10-24T15:44:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0041__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0041","type":"ImageService3","width":1622,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"145.8,1614.9 169.9,1886.6 851.6,1874.4 848.2,1892.3 1164.3,1894.9 1446.3,1896.0 1449.6,1896.0 1471.1,699.0 1476.0,699.1 1478.9,283.1 1483.2,73.4 1363.1,72.0 987.6,66.2 906.0,64.3 887.5,431.0 865.4,431.2 865.9,668.5 166.4,676.5 166.4,677.1 156.0,1115.5 146.0,1579.8 145.8,1614.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0041__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[161.0,1316.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.20864681089807,44.47155657457848]}},{"type":"Feature","properties":{"resourceCoords":[868.0,437.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.20537206040996,44.474857045529085]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0042__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Burlington, Vermont | 1950 | sanborn08912_010 p42 [1]","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"15"},{"label":"confidence","value":"0.78"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6580.0"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-10-24T15:44:30Z","modified":"2026-10-24T15:44:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0042__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0042","type":"ImageService3","width":1645,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"422.4,1893.6 423.4,1893.3 495.0,1872.2 916.4,1905.6 1033.8,1873.3 1071.8,1515.8 1046.9,1316.4 1107.7,1038.5 1109.1,1038.3 1109.1,1036.2 1125.2,1036.2 1322.2,1010.5 1349.8,978.0 1510.0,992.5 1572.5,505.1 1531.8,34.6 781.8,81.5 766.4,80.7 710.4,76.0 426.6,79.0 110.3,81.4 109.7,289.8 114.0,703.0 109.2,703.0 108.7,1892.1 124.7,1891.8 405.4,1886.7 414.6,1886.8 422.4,1893.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0042__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[437.0,921.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.2005624,44.4733176]}},{"type":"Feature","properties":{"resourceCoords":[114.0,703.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.2022427,44.4740527]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0043/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Burlington, Vermont | 1950 | sanborn08912_010 p43","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.88"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:44:30Z","modified":"2026-10-24T15:44:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0043/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0043","type":"ImageService3","width":1622,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1261.8,1658.2 642.2,1758.4 640.5,1770.3 635.9,1792.2 617.2,1851.7 597.0,1890.8 568.3,1933.1 563.5,1933.2 560.4,1933.3 514.5,1908.5 472.7,1897.0 432.6,1893.2 169.9,1883.4 138.4,1872.1 115.6,1849.8 134.4,1806.4 149.5,1793.8 156.3,1764.0 150.6,1746.8 121.0,1725.8 100.2,1674.5 106.1,1613.8 124.1,1486.2 132.6,1413.4 125.5,1344.7 115.4,1307.7 136.9,1295.5 149.1,1267.8 156.2,1201.2 157.6,1150.8 150.7,1082.3 98.2,684.8 24.6,94.0 22.3,76.1 704.7,39.6 702.0,57.7 1018.7,49.0 1301.2,40.0 1320.7,39.4 1603.8,29.1 1610.5,28.9 1613.0,29.0 1621.0,28.6 1621.0,35.7 1572.1,51.1 1598.6,342.3 1563.8,960.1 1570.0,1597.8 1529.3,1777.5 1307.3,1670.3 1307.0,1668.9 1280.4,1660.3 1261.8,1658.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0043/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[110.0,1290.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.20783047954318,44.46518419773035]}},{"type":"Feature","properties":{"resourceCoords":[1322.0,61.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.20191613083514,44.4696904387518]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0044__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Burlington, Vermont | 1950 | sanborn08912_010 p44 [1]","metadata":[{"label":"streets","value":"16"},{"label":"intersections","value":"22"},{"label":"confidence","value":"0.88"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6580.0"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-10-24T15:44:30Z","modified":"2026-10-24T15:44:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0044__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0044","type":"ImageService3","width":1645,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"67.4,965.5 70.0,1827.7 102.5,1881.1 269.5,1901.0 1000.1,1851.5 1045.3,1804.6 1053.0,1745.2 1118.8,1737.8 1119.8,1689.8 1059.7,1671.2 1051.7,1531.6 1081.6,1474.6 1122.0,1472.3 1123.5,1435.4 1204.1,1427.0 1229.8,1234.0 1265.3,1209.8 1530.5,1205.6 1597.3,895.9 1588.1,159.6 1594.4,114.7 1370.0,28.4 1369.5,27.1 1367.8,20.8 1343.0,21.0 1324.8,20.4 730.6,168.1 729.9,179.8 728.4,192.3 727.2,201.5 713.9,260.8 697.4,300.5 672.9,343.9 665.2,344.8 618.6,324.4 577.0,316.6 537.8,316.1 281.6,328.0 223.0,336.8 214.4,415.4 205.2,432.8 198.1,899.4 67.4,965.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0044__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[468.0,973.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.2066884,44.4606667]}},{"type":"Feature","properties":{"resourceCoords":[197.0,973.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.2080786,44.4607239]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0045/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Burlington, Vermont | 1950 | sanborn08912_010 p45","metadata":[{"label":"streets","value":"11"},{"label":"intersections","value":"19"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:44:30Z","modified":"2026-10-24T15:44:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0045/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0045","type":"ImageService3","width":1622,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1116.7,151.4 1416.7,556.3 1418.8,609.0 1418.3,820.3 1415.5,1178.2 1511.1,1234.6 1525.2,1233.0 1505.3,1455.5 1526.6,1805.0 1491.9,1824.7 1409.2,1822.0 1409.0,1837.0 1111.8,1838.9 827.2,1837.4 480.0,1836.9 194.7,1835.8 194.8,1829.7 107.6,1793.6 120.2,1767.4 72.0,1042.5 111.0,752.1 86.8,466.3 133.2,279.9 106.7,117.5 540.2,71.6 1109.8,87.7 1116.7,151.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0045/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[501.0,1837.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.21114,44.4519513]}},{"type":"Feature","properties":{"resourceCoords":[1409.0,1837.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.2108113,44.4552322]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0046/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Burlington, Vermont | 1950 | sanborn08912_010 p46","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.93"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:44:30Z","modified":"2026-10-24T15:44:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0046/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0046","type":"ImageService3","width":1645,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"90.2,72.0 318.9,60.6 433.8,90.6 675.8,52.0 1352.5,44.7 1549.2,118.2 1596.1,257.9 1610.0,467.2 1609.1,544.9 1597.8,908.4 1513.7,1000.5 1507.5,1474.7 1546.3,1663.9 1508.1,1711.5 1516.8,1842.6 1312.1,1818.5 1103.8,1854.9 844.1,1853.3 737.7,1894.2 359.9,1870.4 173.4,1781.2 137.8,1697.1 79.8,1674.6 60.9,1446.5 32.8,1432.8 69.6,1345.2 75.8,1345.2 78.4,1057.8 80.8,707.9 83.7,421.2 83.3,121.7 68.2,121.4 71.3,38.1 90.2,72.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0046/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[520.0,677.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.20880192783665,44.453136398705446]}},{"type":"Feature","properties":{"resourceCoords":[520.0,1037.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.20892186865478,44.451844966022215]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0047__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Burlington, Vermont | 1950 | sanborn08912_010 p47 [1]","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"3"},{"label":"confidence","value":"0.18"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"3028.4"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-10-24T15:44:30Z","modified":"2026-10-24T15:44:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0047__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0047","type":"ImageService3","width":1622,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"575.2,1877.1 658.3,1872.5 674.4,1871.6 700.8,1879.9 694.1,1867.5 694.1,831.0 745.6,428.0 641.8,134.5 419.6,30.1 205.4,76.1 118.2,54.4 63.4,155.7 80.9,461.5 59.0,527.8 119.9,609.0 30.6,1098.2 76.9,1333.3 49.5,1737.8 90.9,1773.3 409.8,1829.0 409.1,1884.0 434.2,1884.2 575.2,1877.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0047__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[409.1,1766.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.225388,44.488277]}},{"type":"Feature","properties":{"resourceCoords":[409.1,1884.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.2250759,44.4878946]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0048__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Burlington, Vermont | 1950 | sanborn08912_010 p48 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.70"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6584.0"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-10-24T15:44:30Z","modified":"2026-10-24T15:44:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0048__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0048","type":"ImageService3","width":1646,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"20.8,667.3 52.4,710.7 59.1,1115.0 91.2,1184.6 58.9,1357.0 99.1,1443.9 97.8,1658.8 581.7,1882.4 749.0,1844.0 887.1,1854.9 888.3,970.5 972.7,895.0 1122.8,845.9 1419.5,680.5 1420.5,679.9 1579.0,559.6 1547.0,248.1 1567.5,116.9 1475.2,54.0 1327.4,36.3 1130.5,91.5 923.0,43.0 525.4,58.7 300.1,106.8 250.1,43.3 15.2,190.2 69.5,277.4 123.8,363.1 20.8,667.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0048__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[579.0,595.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.18543672117411,44.48714057056825]}},{"type":"Feature","properties":{"resourceCoords":[175.0,614.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.18713577580195,44.48794039960253]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0049__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Burlington, Vermont | 1950 | sanborn08912_010 p49 [2]","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"5"},{"label":"confidence","value":"0.76"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"1898.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"4590.0"},{"label":"split_canvas_h","value":"5798.4"}],"created":"2026-10-24T15:44:30Z","modified":"2026-10-24T15:44:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0049__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0049","type":"ImageService3","width":1622,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1573.5,1311.6 1594.0,305.5 1516.6,83.9 1172.3,29.2 986.4,40.3 955.6,76.4 807.7,95.6 811.8,334.3 557.8,1318.0 680.6,1311.9 710.8,1361.8 1112.2,1430.5 1450.0,1403.6 1548.2,1369.6 1573.5,1311.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0049__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[961.3,1076.7],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.2097932,44.4428768]}},{"type":"Feature","properties":{"resourceCoords":[961.3,231.9],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.2094521,44.4459286]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0005/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Burlington, Vermont | 1950 | sanborn08912_010 p5","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"14"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:44:30Z","modified":"2026-10-24T15:44:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0005/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0005","type":"ImageService3","width":1624,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1279.7,1893.1 1204.0,1887.0 1041.3,1884.7 849.6,1875.9 88.8,1882.2 99.3,1275.6 98.9,848.1 106.5,74.5 943.0,102.9 1537.2,116.0 1518.7,633.8 1491.0,1322.5 1475.9,1870.7 1474.6,1897.1 1279.7,1893.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0005/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[925.0,910.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.2070954,44.4791519]}},{"type":"Feature","properties":{"resourceCoords":[99.0,1305.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.2091157,44.4783373]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0051__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Burlington, Vermont | 1950 | sanborn08912_010 p51 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.83"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"4958.0"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-10-24T15:44:30Z","modified":"2026-10-24T15:44:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0051__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0051","type":"ImageService3","width":1622,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"86.1,706.4 62.5,1076.1 147.9,1351.2 125.6,1562.8 208.9,1597.0 325.0,1711.0 363.4,1823.2 457.4,1857.2 708.8,1838.9 904.1,1919.9 1148.2,1894.0 1172.0,1864.3 1182.6,1540.3 1093.2,1420.6 1091.5,1222.5 1040.2,1172.0 1093.1,1091.2 1094.0,885.1 996.7,778.8 1021.1,505.5 950.6,91.1 880.7,59.6 699.1,98.7 190.1,44.2 86.2,96.0 44.9,273.0 41.9,540.8 86.1,706.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0051__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[879.6,598.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.2515548322861,44.51185374753712]}},{"type":"Feature","properties":{"resourceCoords":[879.6,322.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.25252137370136,44.51255505544738]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0006/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Burlington, Vermont | 1950 | sanborn08912_010 p6","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.94"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:44:30Z","modified":"2026-10-24T15:44:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0006/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0006","type":"ImageService3","width":1629,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"130.7,44.8 873.5,18.5 1061.0,22.0 1220.0,20.0 1294.0,24.0 1484.5,22.7 1484.2,36.0 1476.8,696.1 1517.8,695.8 1548.8,695.9 1527.2,1406.5 1484.3,1407.8 1494.4,1867.2 140.4,1909.8 140.6,1874.3 139.7,1359.8 141.9,709.0 131.3,84.8 130.7,44.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0006/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[107.0,59.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.20910149637265,44.47726648537642]}},{"type":"Feature","properties":{"resourceCoords":[1493.0,1883.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.20531366520152,44.47399892195702]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0007/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Burlington, Vermont | 1950 | sanborn08912_010 p7","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"9"},{"label":"confidence","value":"0.88"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:44:30Z","modified":"2026-10-24T15:44:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0007/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0007","type":"ImageService3","width":1624,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"243.3,1892.8 239.4,1424.2 233.7,1013.8 232.8,652.1 227.7,24.3 322.7,25.4 329.6,18.8 513.0,20.0 514.0,11.0 548.0,11.0 549.0,18.0 598.0,19.0 599.0,11.0 600.0,19.0 624.0,19.0 628.0,11.0 629.0,19.0 822.0,13.0 841.3,28.0 1483.8,32.2 1474.0,659.0 1463.1,658.9 1484.4,1280.3 1470.6,1280.3 1474.0,1891.0 243.3,1892.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0007/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1474.0,659.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.2157805,44.4792137]}},{"type":"Feature","properties":{"resourceCoords":[1474.0,1891.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.2156379,44.4769811]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0008/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Burlington, Vermont | 1950 | sanborn08912_010 p8","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"12"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:44:30Z","modified":"2026-10-24T15:44:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0008/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0008","type":"ImageService3","width":1629,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1403.7,42.7 1405.2,611.6 1403.1,739.4 1405.2,1313.0 1401.3,1875.5 1403.5,1915.0 765.7,1913.7 292.4,1914.1 199.1,1850.4 163.7,1476.7 178.5,1475.0 174.8,941.5 174.8,614.1 171.1,42.0 1403.7,42.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0008/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[801.0,684.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.2170886,44.4757689]}},{"type":"Feature","properties":{"resourceCoords":[1404.0,684.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.2155596,44.4758208]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0009/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Burlington, Vermont | 1950 | sanborn08912_010 p9","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.91"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-24T15:44:30Z","modified":"2026-10-24T15:44:30Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0009/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0009","type":"ImageService3","width":1624,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1491.9,1927.3 1481.5,1900.7 1482.3,1851.8 697.0,1831.3 547.9,1830.4 397.1,1842.9 276.1,1876.6 166.7,1926.6 68.7,1922.9 62.8,1876.3 76.4,1272.6 126.2,1184.2 303.1,1130.0 321.9,883.5 129.9,838.8 153.5,134.1 642.0,133.7 806.3,48.5 989.1,115.0 1296.0,33.1 1538.5,111.1 1525.3,587.2 1505.7,1228.7 1501.4,1427.7 1492.9,1552.2 1494.9,1657.6 1491.9,1927.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd375m:g3754m:g3754bm:g089121950:08912_1950-0009/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1511.0,1213.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.21545294363408,44.47360087596333]}},{"type":"Feature","properties":{"resourceCoords":[85.0,1213.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.21517982415736,44.47104120370524]}}]}}]}